Plumbing Apprenticeships in California: Programs, Requirements and How to Apply
Plumbing apprenticeships in California fall under the U.S. registered-apprenticeship system: DOL's list of recognized State Apprenticeship Agencies puts California on it, and the state agency, per DAS's own overview page, is the Division of Apprenticeship Standards (DAS).
The names our research confirmed are UA locals in San Francisco, Los Angeles, San Diego, Oakland, San Jose, Sacramento and Santa Ana — among 26 the UA lists statewide.
Apprentices work as employees paid wages as their sole compensation, whom California's contractor law does not cover; the plumbing credential in our research is the CSLB C-36 contractor license.
Verify before you rely on this
At a glance
DOL's list of recognized State Apprenticeship Agencies puts California on it; the state agency itself, per DAS's own overview page at dir.ca.gov, is the Division of Apprenticeship Standards (DAS) at the Department of Industrial Relations.
Federally, programs are registered either by DOL's Office of Apprenticeship or by a recognized SAA acting for DOL — and California appears in both of DOL's lists.
DAS is California's state apprenticeship agency, but a federal Office of Apprenticeship office also operates in the state, so a program may be registered with either body.
Our research found no statewide journeyman or master plumber license — the state credential is the CSLB C-36 contractor license — and employees paid wages as their sole compensation sit outside the contractor law.
The UA lists 26 locals in California, including Local 38 San Francisco, Local 78 Los Angeles, Local 230 San Diego, Local 250 Los Angeles (Gardena), Local 342 Oakland (Concord), Local 393 San Jose, Local 447 Sacramento and Local 582 Santa Ana (Orange).
Not established in our research: no PHCC, ABC, IEC or employer program in California is named in our sources.
Nationally, PHCC offers apprenticeship content through an online learning academy and ABC describes itself as founded on the merit shop philosophy — ask DAS whether a specific program is registered.
On the license side, the C-36 qualifier needs at least four years of journey-level experience in the classification within the 10 years before applying.
Our research did not confirm how apprenticeship hours map to that requirement — ask CSLB or DAS.
Start with DAS at dir.ca.gov, then contact a UA local — the locals in San Francisco, Los Angeles, San Diego, Oakland, San Jose, Sacramento and Santa Ana are the names our research confirmed.
The California plumbing license ladder
- C-36 Plumbing ContractorContractor
A CSLB license held by the business, covering a safe water supply, ample in volume and of suitable temperature, and the proper disposal of fluid waste — not a credential an apprentice holds.
Who offers plumbing apprenticeships in California?
California appears in the State Apprenticeship Agencies column of the U.S. Department of Labor's recognition list; the state agency itself, per DAS's own overview page at dir.ca.gov, is the Division of Apprenticeship Standards (DAS) at the Department of Industrial Relations.
Federally, a registered program is registered either by DOL's Office of Apprenticeship, through state field offices where no recognized SAA exists, or by a recognized State Apprenticeship Agency acting for DOL.
California appears in both of DOL's lists — a federal Office of Apprenticeship office also operates in the state — so a given program may be registered by either body, and DAS can confirm which.
The apprenticeship organizations our research names in California are UA locals, covered below; our research named no merit-shop sponsor.
“Registers and oversees programs in states without a recognized SAA through state field offices.”
Do California apprentices need to register or hold a license?
Two registrations are in play.
The apprenticeship itself is registered with an apprenticeship agency — federally, either DOL's Office of Apprenticeship or, in a state with a recognized State Apprenticeship Agency such as California, that state agency acting for DOL; California appears in both of DOL's lists, so a given program may be registered by either body.
The plumbing license is the other matter, and it ends differently: our research found no statewide journeyman or master plumber license for individuals in California — the state-level plumbing credential in our research is the CSLB C-36 Plumbing Contractor license, which covers a safe water supply, ample in volume and of suitable temperature, and the proper disposal of fluid waste from the premises.
California's contractor law does not apply to a person who does regulated work as an employee paid wages as their sole compensation (Bus. & Prof. Code §7053), so plumbers who work as employees — apprentices included — need no state plumbing license of their own.
Local city or county plumber certifications and water-agency programs such as backflow testing were not part of our research, so ask the city or county where the work is done.
Which unions run plumbing apprenticeships in California?
The United Association (UA) is the union whose local list gives the clearest confirmed picture our research has for California: 26 locals, including Local 38 San Francisco, Local 78 Los Angeles, Local 230 San Diego, Local 250 Los Angeles (Gardena), Local 342 Oakland (Concord), Local 393 San Jose, Local 447 Sacramento and Local 582 Santa Ana (Orange).
Nationally, the UA says its apprenticeships are registered with DOL and typically last five years, covering plumbing, pipefitting, HVACR, welding and fire protection.
What the local list does not give is each local's intake: our research captured the UA's locals, not application windows, entrance exams or waitlists, so contact the local for the city you want, or ask DAS which programs are currently registered.
Are there merit-shop or employer programs in California?
Our research confirmed none by name: no PHCC chapter, ABC chapter, IEC chapter or individual employer program in California appears in the sources we read, so this page cannot name one.
Nationally, PHCC offers apprenticeship content through an online learning academy, and ABC describes itself as founded on the merit shop philosophy; which chapters run registered plumbing programs is decided chapter by chapter and was not verified for California.
If an employer offers to train you, the test is registration: ask the state apprenticeship agency whether the program is registered before you sign anything.
Schools and related-instruction providers
A registered program pairs on-the-job learning with related technical instruction, and program terms may be time-based (at least 2,000 hours of on-the-job learning), competency-based, or a hybrid of both.
Federally, DOL recommends a minimum of 144 hours of related technical instruction per year of apprenticeship — a recommendation, not a requirement; whether California adds a mandate of its own is not established in our research, so read the program's registered standards and ask the state apprenticeship agency.
Our research also did not name the community colleges or training centers that deliver classroom hours for California plumbing programs, so confirm the classroom side with your sponsor.
How do you apply for a plumbing apprenticeship in California?
Start with DAS, California's state apprenticeship agency (its overview page is at dir.ca.gov): ask which plumbing programs are currently registered and by which body.
Then contact the UA locals in San Francisco, Los Angeles, San Diego, Oakland, San Jose, Sacramento and Santa Ana — the names our research confirmed — about applying, and expect each sponsor to set its own application steps, deadlines and any fees, none of which our research captured.
Federal standards give the shape once you are in: a registered apprentice must be at least 16 unless a higher minimum age is set by law, there is no federal maximum age, and 29 CFR part 30 prohibits discrimination against apprentices and applicants aged 40 or older.
A probationary period may not exceed 25% of the program length or 1 year, whichever is shorter, and it counts toward completion.
At completion you earn a certificate issued by the registration agency — DOL's Office of Apprenticeship or, for state-registered programs, DAS — and that certificate is not a plumbing license.
What This Page Does, and Doesn’t, Cover
This page summarizes the California board pages, statutes, rules and other sources listed below, as read for this state-by-state plumbing apprenticeships series, current as of September 2026.
It is not a substitute for the instructions the California Division of Apprenticeship Standards (DAS), Department of Industrial Relations publishes.
For the rest of the picture in California, see plumbing licensing in California and HVAC apprenticeships in California.
What Plumbing Apprentice Job Listings in California Show Right Now
From the 18 active plumbing apprentice listings on HVACHires as of October 7, 2026.
Employers with the most openings
- Roto-Rooter8
- Service Champions3
- Benjamin Franklin Plumbing2
- Wallace P. Johnson Plumbing2
Pay employers post
- 28% of plumbing apprentice listings in California state any pay at all.
Benefits listings name
- PTO / Paid Time Offnamed in 72%
- 401k Matchnamed in 67%
- Commissionnamed in 61%
- Dental & Visionnamed in 56%
- Health Insurancenamed in 56%
Source: active plumbing apprentice listings on HVACHires, updated daily. Pay figures use only listings that state pay (midpoint of each posted range), hourly and yearly counted separately. Benefits count listings that name the benefit; a listing that doesn’t mention one may still offer it.
Browse 18 jobs →Frequently Asked Questions
Do you need a license to be a plumbing apprentice in California?
No. Our research found no statewide journeyman or master plumber license for individuals in California, and the state's contractor law does not apply to employees paid wages as their sole compensation — which covers apprentices working for a contractor.
The CSLB C-36 contractor license belongs to the business.
Local certifications and water-agency programs such as backflow testing were not part of our research, so ask the city or water agency where you work.
Which union locals train plumbers in California?
The UA lists 26 locals in California, and our research named Local 38 San Francisco, Local 78 Los Angeles, Local 230 San Diego, Local 250 Los Angeles (Gardena), Local 342 Oakland (Concord), Local 393 San Jose, Local 447 Sacramento and Local 582 Santa Ana (Orange).
Nationally the UA says its apprenticeships typically last five years.
We did not capture each local's intake, so contact the local or ask DAS.
How long is a plumbing apprenticeship in California?
Nationally, the UA says its registered apprenticeships typically last five years, covering plumbing, pipefitting, HVACR, welding and fire protection.
Program terms may be time-based (at least 2,000 hours of on-the-job learning), competency-based, or a hybrid, and each program's registered standards fix your term.
Our research did not capture term lengths for specific California programs, so ask the sponsor.
How old do you have to be to start a plumbing apprenticeship in California?
Federal standards require a registered apprentice to be at least 16 unless a higher minimum age is set by law, and there is no federal maximum age: 29 CFR part 30 prohibits discrimination against apprentices and applicants aged 40 or older.
California's own minimum and each sponsor's entry requirements were not captured in our research, so ask DAS and the program you are applying to.
Does finishing an apprenticeship make you a licensed plumber in California?
No. Completing a registered apprenticeship earns a certificate issued by the registration agency, and that certificate is not a plumbing license.
In our research, California's state-level plumbing credential is the CSLB C-36 contractor license, whose qualifier needs at least four years of journey-level experience in the classification within the 10 years before applying.
Ask CSLB and the state apprenticeship agency how a finished apprenticeship fits that path.
More California Resources
Sources
- U.S. DOL: State Apprenticeship Agencies (apprenticeship.gov) (retrieved 2026-09-29)
- U.S. DOL: The Apprenticeship System (retrieved 2026-09-29)
- United Association: Find a Local Union (retrieved 2026-09-29)
- United Association: Apprenticeship (retrieved 2026-09-29)
- CSLB: C-36 Plumbing Contractor classification (retrieved 2026-09-29)
- California Legislative Information: Bus. & Prof. Code §7053 (retrieved 2026-09-29)
- CSLB: Get Licensed to Build (retrieved 2026-09-29)
- eCFR: 29 CFR part 29 (registered apprenticeship standards) (retrieved 2026-09-29)
- eCFR: 29 CFR program standards (instruction, probation, completion) (retrieved 2026-09-29)
- eCFR: 29 CFR part 30 (apprenticeship non-discrimination) (retrieved 2026-09-29)
- PHCC: Training & Education (retrieved 2026-09-29)
- Associated Builders and Contractors (retrieved 2026-09-29)
Sourced from the documents listed above.
Verified September 2026.
This is career information, not legal advice.
Confirm current rules with the California Division of Apprenticeship Standards (DAS), Department of Industrial Relations.